package main 
import "fmt"

func max(a int, b int) int {
	if a > b {
		return a
	} else {
		return b
	}
}

func swap(a string, b string) (string, string) {
	return b, a
}

func main() {
	// var a int = 20
	// var b int = 30
	// var c int = max(a, b)
	// fmt.Println("Maximum value is:", c)
	var a string = "Hello"
	var b string = "World"
	fmt.Println("a:", a)
	fmt.Println("b:", b)
	a, b = swap(a, b)
	fmt.Println("a:", a)
	fmt.Println("b:", b)
}